<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>
<body>
    <div id="app"></div>
</body>
<script>
    Vue.createApp({
        data(){
            return{
                list:['111','222','333'],
                inputvalue:''
            }
        },
        methods:{
            handAddItem(){
                this.list.push(this.inputvalue)
                // 清空输入框
                this.inputvalue = ''
            }
        },
        // v-model 绑定输入值
        template:`
            <div>
                <input v-model="inputvalue"/>
                <button v-on:click="handAddItem">增加信息</button>
            <ul>
                <li v-for="(item,index) of list">[{{index}}]{{item}}</li>
            </ul>
            </div>
            `
    }).mount("#app")
</script>
</html>